Simplify constant pool usage in arm64 code generator (by removing extra argument

runtime/vm/runtime_entry_arm64.cc

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/runtime_entry.h"
 
 #include "vm/assembler.h"
@@ skipping 31 matching lines @@
     ASSERT(argument_count == this->argument_count());
     // Since we are entering C++ code, we must restore the C stack pointer from
     // the stack limit to an aligned value nearer to the top of the stack.
     // We cache the Dart stack pointer and the stack limit in callee-saved
     // registers, then align and call, restoring CSP and SP on return from the
     // call.
     __ mov(R25, CSP);
     __ mov(R26, SP);
     __ ReserveAlignedFrameSpace(0);
     __ mov(CSP, SP);
-    __ BranchLink(&label, kNoPP);
+    __ BranchLink(&label);
     __ mov(SP, R26);
     __ mov(CSP, R25);
   } else {
     // Argument count is not checked here, but in the runtime entry for a more
     // informative error message.
-    __ LoadExternalLabel(R5, &label, kNotPatchable, PP);
-    __ LoadImmediate(R4, argument_count, kNoPP);
-    __ BranchLink(&StubCode::CallToRuntimeLabel(), PP);
+    __ LoadExternalLabel(R5, &label);
+    __ LoadImmediate(R4, argument_count);
+    __ BranchLink(&StubCode::CallToRuntimeLabel());
   }
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64